EP3119115A1 - Stations cellulaires et procédés de notification d'état d'alerte - Google Patents

Stations cellulaires et procédés de notification d'état d'alerte Download PDF

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Publication number
EP3119115A1
EP3119115A1 EP15199744.2A EP15199744A EP3119115A1 EP 3119115 A1 EP3119115 A1 EP 3119115A1 EP 15199744 A EP15199744 A EP 15199744A EP 3119115 A1 EP3119115 A1 EP 3119115A1
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EP
European Patent Office
Prior art keywords
warning
wireless communication
communication devices
mme
cellular station
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP15199744.2A
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German (de)
English (en)
Inventor
Ming-Dao Chuang
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Acer Inc
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Acer Inc
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Publication date
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Publication of EP3119115A1 publication Critical patent/EP3119115A1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/90—Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast

Definitions

  • the application generally relates to wireless communications, and more particularly, to cellular stations and method for warning status reporting in wireless communication systems.
  • GSM Global System for Mobile communications
  • GPRS General Packet Radio Service
  • EDGE Enhanced Data rates for Global Evolution
  • WCDMA Wideband Code Division Multiple Access
  • CDMA-2000 Code Division Multiple Access 2000
  • TD-SCDMA Time Division-Synchronous Code Division Multiple Access
  • WiMAX Worldwide Interoperability for Microwave Access
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • TD-LTE Time- Division LTE
  • an enhanced warning status reporting is proposed, in which message originators, such as service network operators and government authorities, need to know if warning the population is likely to be successful, or if alternative means of warning citizens need to be considered.
  • service network operators need to know if they fulfill the service requirements and have actually broadcast warning messages to citizens.
  • 3GPP 3rd Generation Partnership Project
  • TR Technical Report 23.712
  • an evolved Node-B (eNB) may broadcast warning messages for Earthquake and Tsunami Warning System (ETWS) and send one or more Warning Status Report messages to inform the Mobility Management Entity (MME) about the result of the broadcast being successful or not.
  • EWS Tsunami Warning System
  • EWS Earthquake and Tsunami Warning System
  • a cellular station coupled to a Mobility Management Entity comprises a wireless transceiver and a controller.
  • the wireless transceiver is configured to perform wireless transmission and reception to and from a plurality of wireless communication devices.
  • the controller is configured to receive a warning message delivery request for an Earthquake and Tsunami Warning System (ETWS) from the MME, start broadcasting a public warning message to the wireless communication devices via the wireless transceiver and send a warning message delivery response to the MME in response to the warning message delivery request, and send a warning status report comprising status information of one or more of the wireless communication devices to the MME.
  • EWS Earthquake and Tsunami Warning System
  • a method for warning status reporting which is executed by a cellular station coupled to an MME.
  • the method comprises the steps of: receiving a warning message delivery request for an ETWS from the MME; starting to broadcast a public warning message to the wireless communication devices via the wireless transceiver and sending a warning message delivery response to the MME in response to the warning message delivery request; and sending a warning status report comprising status information of one or more of the wireless communication devices to the MME.
  • Fig. 1 is a block diagram of a wireless communication environment according to an embodiment of the application.
  • the wireless communication environment 100 comprises three wireless communication devices 110 ⁇ 130 and a service network 140, wherein all of the wireless communication devices 110 ⁇ 130 are wirelessly connected to the service network 140 for obtaining mobile services.
  • Each of the wireless communication devices 110 ⁇ 130 may be a mobile device, such as a feature phone, smartphone, panel Personal Computer (PC), or laptop computer, or may be an MTC device installed in a fixed location, such as a critical public infrastructure (e.g., water treatment facility, bridge, or gas pipeline), or may be any computing device supporting the wireless technology utilized by the service network 140.
  • a critical public infrastructure e.g., water treatment facility, bridge, or gas pipeline
  • the service network 140 is an LTE network, LTE-A network, or TD-LTE network.
  • the service network 140 comprises an access network 141 and a core network 142, wherein the access network 141 is responsible for processing radio signals, terminating radio protocols, and connecting the wireless communication devices 110 ⁇ 130 with the core network 142, while the core network 142 is responsible for performing mobility management, network-side authentication, and interfaces with public/external networks (e.g., the Internet).
  • Each of the access network 141 and the core network 142 may comprise one or more network nodes for carrying out said functions.
  • the access network 141 may be an Evolved-UTRAN (E-UTRAN) which includes at least a cellular station, e.g., an evolved NB (eNB), and the core network 142 may be an Evolved Packet Core (EPC) which includes a Home Subscriber Server (HSS), Mobility Management Entity (MME), Serving Gateway (S-GW), Packet Data Network Gateway (PDN-GW or P-GW), Cell Broadcast Centre (CBC), etc.
  • EPC Evolved Packet Core
  • HSS Home Subscriber Server
  • MME Mobility Management Entity
  • S-GW Serving Gateway
  • PDN-GW or P-GW Packet Data Network Gateway
  • CBC Cell Broadcast Centre
  • a CBC is responsible for the management of CBS messages including: allocation of serial numbers; modifying or deleting CBS messages held by the eNB; initiating broadcast by sending fixed length CBS messages to an eNB for each language provided by the cell, and where necessary padding the pages to a length of 82 octets; determining the set of cells to which a CBS message should be broadcast, and indicating within the Serial Number the geographical scope of each CBS message; determining the time at which a CBS message should commence being broadcast; determining the time at which a CBS message should cease being broadcast and subsequently instructing each eNB to cease broadcast of the CBS message; determining the period at which broadcast of the CBS message should be repeated.
  • the core network 142 may be further connected to a Cell Broadcast Entity (CBE) which is outside the scope of the service network 140 and is responsible for all aspects of formatting Cell Broadcast Service (CBS) messages, including the splitting of a CBS message into a number of pages.
  • CBE Cell Broadcast Entity
  • CBS Cell Broadcast Service
  • Fig. 2 is a block diagram illustrating a cellular station according to an embodiment of the application.
  • the cellular station comprises a wireless transceiver 10, a controller 20, a storage device 30, and a wired interface 40.
  • the wireless transceiver 10 is configured to perform wireless transmission and reception to and from the wireless communication devices 110 ⁇ 130.
  • the wireless transceiver 10 comprises a Radio Frequency (RF) device 11, a baseband processing device 12, and an antenna 13.
  • the baseband processing device 12 is configured to perform baseband signal processing.
  • the baseband processing device 12 may contain multiple hardware components to perform the baseband signal processing, including Analog-to-Digital Conversion (ADC)/Digital-to-Analog Conversion (DAC), gain adjusting, modulation/demodulation, encoding/decoding, and so on.
  • the RF device 11 may receive RF wireless signals via the antenna 13, convert the received RF wireless signals to baseband signals, which are processed by the baseband processing device 12, or receive baseband signals from the baseband processing device 12 and convert the received baseband signals to RF wireless signals, which are later transmitted via the antenna 13.
  • the RF device 11 may also contain multiple hardware devices to perform radio frequency conversion.
  • the RF device 10 may comprise a mixer to multiply the baseband signals with a carrier oscillated in the radio frequency of the supported wireless technology, wherein the radio frequency may be 900MHz, 2100MHz, or 2.6GHz utilized in LTE/LTE-A/TD-LTE technology, or another radio frequency depending on the wireless technology in use.
  • the controller 20 may be a general-purpose processor, a Micro Control Unit (MCU), an application processor, a Digital Signal Processor (DSP), or the like, for controlling the wireless transceiver 10 for wireless communications with the wireless communication devices 110 ⁇ 130, storing and retrieving data to and from the storage device 30, sending/receiving messages to/from other network entities through the wired interface 40.
  • the controller 20 coordinates the aforementioned operations of the wireless transceiver 10, the storage device 30, and the wired interface 40 for performing the method for warning status reporting.
  • controller 20 may be incorporated into the baseband processing device 12, serving as a baseband processor.
  • the storage device 30 may be a memory, such as a FLASH memory or a Non-volatile Random Access Memory (NVRAM), or a magnetic storage device, such as a hard disk or a magnetic tape, or an optical disc, or any combination thereof for storing instructions and/or program code of applications and/or communication protocols.
  • NVRAM Non-volatile Random Access Memory
  • the wired interface 40 is responsible for providing wired communications with other network entities, such as the MME.
  • the wired interface 40 may include a cable modem, an Asymmetric Digital Subscriber Line (ADSL) modem, a Fiber-Optic Modem (FOM), and/or an Ethernet network interface.
  • ADSL Asymmetric Digital Subscriber Line
  • FOM Fiber-Optic Modem
  • the cellular station may further include other functional devices, such as a display device (e.g., Liquid-Crystal Display (LCD), Light-Emitting Diode (LED) display, or Electronic Paper Display (EPD, etc.), an Input/Output (I/O) device (e.g., button, keyboard, mouse, touch pad, video camera, microphone, speaker, etc.), and a power supply, etc., and the invention is not limited thereto.
  • a display device e.g., Liquid-Crystal Display (LCD), Light-Emitting Diode (LED) display, or Electronic Paper Display (EPD, etc.
  • I/O Input/Output
  • Fig. 3 is a flow chart illustrating the method for warning status reporting according to an embodiment of the application.
  • the method for warning status reporting is executed by a cellular station, such as an eNB, which is coupled to the MME.
  • the cellular station receives a warning message delivery request for the ETWS from the MME (step S310).
  • the cellular station starts broadcasting a public warning message to the wireless communication devices and sends a warning message delivery response to the MME (step S320).
  • the public warning message may be a type 1/10/11/12 System Information Block (SIB 1/10/11/12), or a paging message including an ETWS indication.
  • SIB 1/10/11/12 System Information Block
  • the cellular station sends a warning status report comprising the result of the broadcast and status information of one or more of the wireless communication devices to the MME (step S330), and the method ends.
  • the cellular station may keep broadcasting the public warning message, and periodically update the result of the broadcast and the status information of the wireless communication devices. Accordingly, the cellular station may periodically send the warning status report with the updated broadcast result and status information of the wireless communication devices.
  • Figs. 4A and 4B show a message sequence chart illustrating the warning status reporting according to an embodiment of application.
  • a large scale natural disaster such as an earthquake or tsunami, happens (step S401).
  • the CBC receives an Emergency Broadcast Request message from a CBE (step S402). Please note that, the CBE is not depicted in Figs. 4A and 4B as it is beyond the scope of a 3GPP network.
  • the CBC sends a Write-Replace Warning Request message including a warning area list and a number of reports requested to the MME (step S403).
  • the warning area list indicates the areas where the warning message needs to be broadcast.
  • the warning area list includes a list of Tracking Area Identifiers (TAIs).
  • TAIs Tracking Area Identifiers
  • the MME responds to the CBC with a Write-Replace Warning Confirm message without waiting for a response from any eNB (step S404).
  • the CBC may confirm to the CBE that it has initiated the warning message delivery procedure (step S405).
  • the MME forwards the Write-Replace Warning Request message to the eNBs that serve a tracking area as listed in the list of TAIs (step S406).
  • the eNB starts broadcasting the public warning message with an ETWS indication (step S407), and periodically checks and generates the status information of the wireless communication devices (step S408).
  • the eNB checks with each wireless communication device whether there's an ongoing procedure or transmission with the wireless communication device but no response from the wireless communication device has been received.
  • the ongoing procedure is a Radio Resource Control (RRC) connection reconfiguration procedure and the response is an RRC_CONNECTION_RECONFIGURATION_COMPLETE message, or the response is a Hybrid Automatic Repeat reQuest (HARQ) Acknowledgement (ACK) or non-acknowledgement (NACK) for the ongoing data/message transmission. If the checking result is yes, the wireless communication device is determined to be abnormal (e.g., the wireless communication device may be impaired or disconnected from the service network due to the disaster).
  • RRC Radio Resource Control
  • HARQ Hybrid Automatic Repeat reQuest
  • ACK Acknowledgement
  • NACK non-acknowledgement
  • the eNB checks with each wireless communication device whether there's an ongoing procedure or transmission with the wireless communication device and a response from the wireless communication device has been received, or whether a message initiated for a new procedure has been received from the wireless communication device.
  • the message is an RRC CONNECTION REQUEST message or a Buffer Status Report message. If the checking result is yes, the wireless communication device is determined to be normal (i.e., the wireless communication device is not damaged or disconnected from the service network by the disaster).
  • the eNB may use a check timer to count a predetermined period of time, and perform said checking for each expiry of the check timer, or the eNB may perform said checking in response to each broadcast of the public warning message. Alternatively, the eNB may perform said checking only once when it is required to send the warning status report.
  • the eNB responds to the MME with a Write-Replace Warning Confirm message which includes a Broadcast Completed Area List (step S409).
  • the Broadcast Completed Area List includes a list of cells which are available for broadcast at the time when the eNB received the Write-Replace Warning Request message.
  • the wireless communication device activates emergency user alert and message popup to alert the user upon reception of the public warning message (step S410).
  • the number of reports requested in the Write-Replace Warning Request message has a value equal to 1.
  • the eNB sends a Warning Status Report message, which includes a list of warning status and status information of the wireless communication devices, to the MME (step S411).
  • the list of warning status includes the cell identifiers of each cell in the eNB and the result of the broadcast for each cell.
  • the status information of the wireless communication devices includes the UE identities (e.g., International Mobile Subscriber Identity (IMSI), International Mobile Equipment Identity (IMEI), or Temporary Mobile Subscriber Identity (TMSI)) of each wireless communication device which is determined to be abnormal in step S408, or the UE identities of each wireless communication device which is determined to be normal in step S408. That is, the eNB may choose to report the abnormal or normal wireless communication devices, as long as the MME goes along with this agreement regarding whether the abnormal or normal wireless communication devices are to be reported.
  • IMSI International Mobile Subscriber Identity
  • IMEI International Mobile Equipment Identity
  • TMSI Temporary Mobile Subscriber Identity
  • the MME aggregates the lists of warning status received from all eNBs, and then forwards the aggregated list in one or more Warning Status Report Indication messages to the CBC (step S412).
  • the MME should be capable of merging the status information received from different eNBs so that wireless communication devices won't be missed out due to cell reselection or handover.
  • Figs. 5A and 5B show a message sequence chart illustrating the warning status reporting according to an embodiment of application. Similar to the embodiment of Figs. 4A and 4B , a large scale natural disaster, such as an earthquake or tsunami, happens (step S501), and the CBC receives an Emergency Broadcast Request message from a CBE (step S502). In response to the Emergency Broadcast Request message, the CBC sends a Write-Replace Warning Request message including a warning area list and a number of reports requested to the MME (step S503). In this embodiment, the number of reports requested has a value equal to 2.
  • the MME responds to the CBC with a Write-Replace Warning Confirm message without waiting for a response from any eNB (step S504).
  • the CBC may confirm to the CBE that it has initiated the warning message delivery procedure (step S505).
  • the MME forwards the Write-Replace Warning Request message to the eNBs that serve a tracking area as listed in the list of TAIs (step S506).
  • the eNB starts broadcasting the public warning message with an ETWS indication (step S507), and then responds to the MME with a Write-Replace Warning Confirm message which includes a Broadcast Completed Area List (step S508).
  • the wireless communication device activates emergency user alert and message popup to alert the user upon reception of the public warning message (step S509).
  • the eNB After completing the first broadcast repetition in all the cells, the eNB starts querying the status of the wireless communication devices. Specifically, the eNB sends an indication to one or more of the wireless communication devices (step S510) and receives a reply to the indication from the one or more of the wireless communication devices (step S511).
  • the indication may be a paging message including specific UE identity (e.g., IMSI, IMEI, or TMSI) or Group ID, and the wireless communication device which has a UE identity or Group ID matching the one included in the paging message will send a paging response if it is functioning normally.
  • steps S510 and S511 may be repeated for querying different wireless communication devices at different times.
  • the eNB may query the wireless communication devices in an order of the time when they registered to the eNB, or in an order of how long they haven't send any message to the eNB.
  • the eNB may query the wireless communication devices according to their SIM parameters, e.g., the last digit of the IMSI, or the eNB may just randomly choose which wireless communication device to query.
  • the eNB generates the status information of the wireless communication devices according to the query results, and then sends a Warning Status Report message, which includes a list of warning status and the status information of the wireless communication devices, to the MME (step S512).
  • the status information of the wireless communication devices includes the UE identities (e.g., IMSI, IMEI, or TMSI) of each wireless communication device which is not responded to the indication sent in step S510. That is, the status information indicates the wireless communication devices which may be in an abnormal state, such as being impaired or shut-down.
  • the MME In response to the Warning Status Report message, the MME aggregates the lists of warning status received from all eNBs, and then forwards the aggregated list in one or more Warning Status Report Indication messages to the CBC (step S513).
  • the eNB continues the broadcast of the public warning messages.
  • the eNB starts querying the status of the wireless communication devices (steps S514 ⁇ 515).
  • the detailed description of steps S514 ⁇ 515 is similar to steps S510 ⁇ 511 as mentioned above, and is omitted herein for brevity.
  • the eNB generates the status information of the wireless communication devices according to the query results, and then sends a Warning Status Report message, which includes a list of warning status and the status information of the wireless communication devices, to the MME (step S516).
  • the MME aggregates the lists of warning status received from all eNBs, and then forwards the aggregated list in one or more Warning Status Report Indication messages to the CBC (step S517).
  • the present application realizes improved warning status reporting by allowing the eNB to report the status information of the wireless communication devices as well as the result of the broadcast.
  • this may provide sufficient information for disaster control without introducing extra signaling procedures ( Figs. 4A and 4B in particular).
  • warning message delivery procedure in the embodiments of Figs. 4A , 4B , 5A , and 5B , reference may be made to the 3GPP TR 23.712 and TS 23.041.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Business, Economics & Management (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Management (AREA)
  • Environmental & Geological Engineering (AREA)
  • Public Health (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)
  • Databases & Information Systems (AREA)
EP15199744.2A 2015-07-14 2015-12-14 Stations cellulaires et procédés de notification d'état d'alerte Withdrawn EP3119115A1 (fr)

Applications Claiming Priority (2)

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US201562192138P 2015-07-14 2015-07-14
US14/937,001 US20170019776A1 (en) 2015-07-14 2015-11-10 Cellular stations and methods for warning status reporting

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US10085143B2 (en) * 2016-09-30 2018-09-25 Qnexis Inc. System for managing organizational emergencies and coordinating emergency responses
US11140744B2 (en) * 2018-11-01 2021-10-05 Lg Electronics Inc. Method and apparatus for restricting to receive a system information in a wireless communication system

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CN106358168A (zh) 2017-01-25
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